Electric diverter valve problem

[fjellheimen]

Hi
I'm in the process of adding a 3rd function for my grapple on an old John Deere 1040 using a 12v solenoid diverter valve.

When the solenoid doesn't get power oil flows from the bottom ports and through the two middle ports. However when the solenoid gets powered it stops oil flowing through the middle ports, but no oil flows through the two top ports. Any ideas on what the problem might be?

 

[LouNY]

I'd say it's plumbed backwards.
All of mine when de-energized flow is straight through,
then when energized it is diverted to the side ports.

 

[oldnslo]

What are the markings by all the ports? Are any of the ports labeled P1, P2? If yes those would be the common ports or inlet to the diverter Like Lou I suspect a plumbing issue.

 

[fjellheimen]

The two ports on the bottom are labeled P1 and P2 and are connected to the ports on my hydraulic central.

 

[LouNY]

That looks like it would be right, but.
When I mounted mine the blocks could be stacked with O-ring seals between the blocks you could stack as many as 5 together,
the attached pdf says 3 in series.
It seems to me that your inputs the "P" ports may be the middle ports.
It has been a while since I did my last one of those and I recall the directions to be confusing and contradictory.
When you say your hydraulic central are you referring to your curl output from the loader valve to the curl cylinders?

 

[oldnslo]

The picture in post 4 showing P1 & P2. Next to P2 is an arrow pointing towards the port above it. Do you have any literature on this valve or brand and or model code. Unfortunately I have seen diverter where two side ports are inlet and also where the two top ports are inlet.

you would have to unhook a couple lines but could verify porting with air hose to see which ports are inlets.

 

[BukitCase]

Looking at your first picture, no power should connect the two bottom ports (inlet) to the two TOP ports (outlet) - energizing the solenoid SHOULD connect the two bottom ports to the two MIDDLE ports and NOT to the two top ports.

Don't ask how I know this, but if you reverse top and bottom ports, you should STILL get flow when NOT energized, BUT - energising will stop ALL flow.

Only thing I can think of that would cause what you describe is (maybe) an incorrectly installed spool (the "switch" that's moved by the solenoid.

Look at the arrows next to the ports - these SHOULD indicate flow, so whatever function you're "diverting" (like the curl function) should come in the bottom and out the top when NOT powered - as Lou said, power should cause the bottom (inlet) to be switched to the middle ports (still looking at your first picture)

You could try disconnecting ALL hoses (tractor NOT running, of course) - then, a gentle blow with an air hose (NOT powered) IN to the bottom ports SHOULD be felt out of the top ports (A or B) - power to solenoid SHOULD cause air into bottom to be felt at the MIDDLE ports.

If this is NOT what happens, your diverter is either defective or a REALLY ODD model... Steve

Edit - if "oldnslow" is true, guess that makes me "older and slower" (definitely the slow part)

 

[fjellheimen]

Guess I have to disconnect the hoses and blow some air (and waste some hydraulic oil).

The diverter is model number shv6/2-dc12-b purchased from hydraulic-master.com don't see any brand name on it. Documentation is unfortunately lacking.

 

[BukitCase]

The possible GOOD news - since you're NOT stacking multiple diverters, once you know what's REALLY in's and out's you should be able to move your hoses - (didn't say this wouldbe EASY :=)... Steve

 

[jigs_n_fixtures]

Hi
I'm in the process of adding a 3rd function for my grapple on an old John Deere 1040 using a 12v solenoid diverter valve.

When the solenoid doesn't get power oil flows from the bottom ports and through the two middle ports. However when the solenoid gets powered it stops oil flowing through the middle ports, but no oil flows through the two top ports. Any ideas on what the problem might be?
View attachment 741762

I think it is not plumbed correctly. When it is deenergizzed, the flow should go out the A and B ports on the top, the cast in labels can be seen in your photo. The ones facing out should be labeled C and D, the two on the bottom should be labeled P1 and P2.

A and B should always be the normal flow in the de-energized state.
C and D should always be flowing when the solenoid is energized.
P1 and P2 are always the inlets. If you are stacking valves, the A and B ports get sealed to the P ports of the next valve, the actual hookup varies by the valve manufacturer.

 

[lman]

That looks like the valve that I just put on my tractor.

 

[oldnslo]

The attachment is for a diverter with P1 & P2 on the top and labeled very similar to what the pictures show. Model code is also kind of similar.

 

[LD1]

I agree its probably just a plumbing issue.

Air test it to figure out what is what and let us know

 

[fjellheimen]

I tried blowing air through the diverter and it seems like the middle ports are indeed the intake ports and energizing the solenoid diverts the flow as it should. I just need a few 90 degree elbows so I can connect everything to the correct outlets and my grapple should be operational.

So thanks everyone for all the help!

 

[BukitCase]

That's the oddest configuration of those type diverters I've ever seen; they were originally designed so that they could be STACKED for more options - like this pair on my 580B. Physically I don't see how that'd even be possible with yours.

In MY pic, non-energized flow goes in the bottom and out the top - then you have the option of energizing EITHER diverter, which sends/returns the bottom inlet to whichever CENTER ports got energised. ( the writhing bundle of snakes is just to keep it as low profile as possible)

I have another project that'll have FOUR of those valves stacked (if I LIVE long enough )

Your pics look to me like yours should be EXACTLY the same; I only hope you got a good deal on it... Steve

 

[oldnslo]

Fjell
Thanks for letting us know what the potential solution was to your problem

Buckit
Companies make both styles of diverters, some that can be sandwiched together like yours and some like the one fjell has. If you require is one additional function either style will work

 

[BukitCase]

Good to know, O&S, thanks - filing that info away so I don't shoot myself in the foot when that next diverter project gets to the top of the list ... Steve

 

[fjellheimen]

I reconnected the hydraulic hoses - and it still doesn't work! After the air test I felt pretty confident that it should work, but once I had connected everything, refilled some hydraulic oil the result is that energizing the solenoid does absolutely nothing. Any suggestions on what my next step should be?(maybe selling the tractor... )

 

[alexpops]

is the solenoid valve adjustable internally? could be a simple adjustment that the QC guy in shenzen didn't make & the high psi & viscosity of the oil is kicking off your pressure relief on the energized side? Does the manual override work & is it in the right position? (not engaged) Or, since you were getting air flow, (at the valve?), are the energized hoses clear to the grapple? Maybe a check valve is in the circuit somewhere & reversed?

 

[LouNY]

Does it work when de-energized?
Does that one have the manual over ride that you can push.
With the tractor shutdown with your hand on it and switching it on and off do you hear and feel the plunger moving.